Improvement in electric clocks



UNITED STATES PeTEnlma S. A. KENNEDY, OF ATTLEBOROUGH, AND S. WT. HOLT AND J. GERLACH, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN ELECTRIC CLOCKS.

Specification forming` part ofLetters Patent No. 71,6211, dated December I3, 1867.

To all whom t may concern:

Be it known that we, SAMUEL A. KENNEDY,

ot' Attleborough, Bucks county, in the Statel nying drawings, and to thcletters of reference marked thereon.

The nature ot our invention mainly consists iu forming and breaking the connection with the positive and negative poles of a battery by means of a vibrating bar operated by the pendulum, and arranged and operating as hereinafter described.

In the accompanying drawings, which make a part of this specilication, Figure 1is a front elevation ot' the improved clock. Fig. 2 is an edge view ot the same. Fig. 3 is a front view of the pendulum H and magnetic bar M in connection. Fig. 4 is an edge view ot' the same. Fig. 5 is a front view ot' a modification of the said bar and pendulum. Fig. 6 is an edge view of the same. Fig. 7 is a vertical section ot' the pawl l. Fig. Sis an isometrical view of the forked bar Gand parts in connection therewith. Fig. 9 is a like view of the lever F. Fig. 1() is a like view of one of the brackets, m. Fig. 11 is atop View of the bridge K. Fig. 12 is a vertical section of the same. Fig. 13 is a bottom view of the said bridge. Fig. 14 is an isometrical view of the bar L,

A is a board to which the several parts of the clock are attached.

A' is a shelf which supports the vertical plates B B that support the journals ot' the shafts a b c of the center wheel, G, the secondwheel D, and the ratchet-wheel E.

F is a vertical lever, which is actuated by the pendulum H, for giving an automatic motion to the ratchet-wheel E, there being a slotted arm, d, of the lever, which receives the pin e of the forked bar G, in which the pawl I is hung by means of the horizontal rod j'. The upper end of the said bar G is permanently confined to the rock-shaftf. At each vibration of the pendulum from right to left the pawl is drawn outward from the ratchet-wheel by the pendulum bearing against the pin g ot the said lever F, and when the pendulum swings back to the right the weight ot" the lever and the forked bar forces the pawl forward until the arm l1l of said bar bears against the edge ot' the contiguous vertical plate B.

There is a set-screw, j, in the lug la of the forked bar Gr, by which the heel end ot' the pawl is borne down more or less to give a longer or shorter catch ofthe pawl to regulate the motion of the ratchet-wheel; and there is a set-screw, l, in the heel ot' the pawl for equalizing the balance ot' do., so as to prevent its falling too hard upon the ratchet.

J is the click-lever.

K is an adjustable bridge, supported by the brackets m and m. The bridge is provided with plates n and n, that communicate with the magnetic wires, there beinginsulated projections o o', which have wires p p and p p connected with the inaiircircuit wires.

L is a bar for changing the circuit, it having points l 2, which connnunicate alternately at each motion of the pendulum with the wires p and p in the projections o and o', the pin q ofthe pendulum bearing alternately against the vertical parts 3 and 4 ot' the bar, and thus changing the points 1 and 2 with the wires p p and l) p', so as to change the current.

The points l and 2 ofthe bar L, and the upper ends of the circuit-wires p p. iu the projections o o of the bridge K, are of gold. The said projections 0 and o have grooved facings, as seen in Figs. 11 and 12, to guide the points l and 2 oi' the bar L. The former facing is made of brass and thelatter of agate.

The pendulum H is shown in detail, Figs. 3 and et, Sheet No. 2, the forked bar G and parts attached in Fig. 8, the lever F in Fig. 9, one of the brackets, m, in Fig. 10, the bridge K in Figs. 11, 12, and 13, and the sliding bar L in Fig. 14. The arm h and pin e may be an extension of the rod f in the forked bar G, as represented in Fig. S.

The pendulum H has a magnetized bar, M, which is actuated to produce the vibration of the pendulum by the galvanometers S and S', that are, in the drawings, placed above the center of motion. They may, however, be

placed below the center, when desired, as the same result would. be produced. We contemplate using four or more galvanometerswhen we want a powerful current, and also having a plurality of the magnetized bars M in the pendulum H. In Figs. 5 and 6 four are yrepresented, which are insulated on their bearings by means of a thin coating of wax, or other- Wise.

The circuit-wire, commencing with the platinum or positive pole of a battery, passes through the button r, and thence through the button r' to the galva-nometer S, and from that to S', as indicated by the arrows, and through the button r2, and thence through the button r3, and through the stud s on the bridge K; thence through the projection o, where it forms the point p. The wire passes from thence through the screw t, which communicates with the bracketm, to which is connected the wire leading to the negative pole of the battery through the button r4. rlhe current is formed when the pendulum is swung to the right, as represented in the drawings; but when it is swung to the left it moves the sliding-bar L so as to bring the points 1 and 2 into connection with the points pp' of the projections o and o', thus changing the current as it passes from r2 to r, thence through the stud s', and thence to the point p' in the projection o on the bridge K, where it communicates with the sliding bar L, at the point 2, and passes through said bar to its point l, where it communicates with the wire 1J in the projection o; thence to screw t in the bracket m', communicating with the wire leading to the negative pole of the battery through button r4. When the pendulum comes into the position as it now stands the polarized bar M is in connection with the galvanometer S', and being repelled by the same the motion of the pendulum is changed from right to left, and when it reaches the galvanometer Sthe sliding bar L closes the circuit with the said galvanback to the right, and thus 'the movement is continuously kept up.

What we claim as new, and desire to secure by Letters Patent, is-

1. The combination and arrangement of two or more galvanometers with one or more polarized steel bars, combined with the pendulum, and arranged either above or below the center ot' motion, substantially as described, and for the purpose set forth.

2. Producing a double automatic circuit by means of the combination of the pendulumH with the sliding bar L, arranged and operating in relation to the electric wires p and p', which project to the surface of the projections o and o' of the bridge K, substantially as described, and for the purpose specied.

3. The combination and arrangement of the electric wires with the batteries, the galvanometers S and S', the sliding bar or circuitchanger L, and the bridge K, so as to produce adouble-actin g circuit bymeans of the motions of the pendulum, substantially as described.

4. The combination of the ratchet-wheel E with the pendulum H, by means of the lever F, forked bar G, and pawl l', arranged and operating in relation to each other substantially as described, and for the purpose specified.

5. The combination of the ratchet-wheel shaft c with the shafta, by means of the wheelsvw SAiNIL. A. KENNEDY. [L. s]

S. W. HOLT. lL. s.

JOS. GERLAGH. [L s.

Witnesses :4y

.Lorna `WHITE,

ometer, and the pendulumisng,---'MSrnrnnn Us'rrck. 

